Some dead twigs on our pear tree have been colonised by this coral spot fungus Nectria cinnabarina.
Coral spot is an interesting fungus because it exists in two forms. One is saprotrophic, only growing on dead twigs, but there's also a parasitic form that actively attacks and kills live plants that are already in a weakened state. I'm hoping it's the former rather than the latter, otherwise our pear tree's days are numbered.
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